For remote making & breaking circuits General:1.certificates:ce, kema,vde,ek,esc,gost,rcc,ul2. ... over-load relay; frequent start-up and control of ac contactor;4. utilization category:ac-3,ac-45.altitude:<2000m;6 ... exceed ± 5 °C9.standard:IEC/EN 60947-4-1 Chint NC1 Series contactor